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2 shee;; 'g1;e"e O. A. HALE. THE-RMDSTATIU REGULATING DEVICE.

N 9, Pam-tented Dec. 24,1895.

WITNESSES,

jiNvlE 2 (No Model.) 2 Sheets-Sheet 2.

' 'QALHALR- THERMOSTATIU REGULATING DEVICE.

No.- 551,959. Patented D e0. .24, 1895.

'WVITNESSES INVENTOR,

ANDREW B wAuAMmuuTo-umo WASHINGTPILD C.

.I on

UNITED STATES 1 PATENT FFI E.

CHARLES A. HALE, OF CLEVELAND, OHIO, ASSIGNOR TO THE TIME ELECTRICCOMPANY, OF SAME PLACE.

. THERI'VIOSTATIQ REGULATING DEVICE.

SPECIFICATION forming part of Letters Patent No. 551,959, dated December24, 1895., Application filed January 8, 1894. Renewed February 18, 1895-Serial No, 538,856. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES A. HALE, a citizen of the United States, anda resident of Cleveland, county of Cuyahoga, and State of Ohio, haveinvented certain new and useful Improvements in Thermostatic RegulatingDevices, of which the following is a specification, the principle of theinvention being herein explained and the best mode in which Ihavecontemplated applying that principle, so as to distinguish it from otherinventions.

In the accompanying drawings, Figure I represents a diagram of myimproved thermostatic regulating device, illustrating the. electricalconnections and details of the same;

Fig. II, a side view of the check and draft operating mechanism, andFig. III a diagrammatic view of the device, illustrating the electricaland mechanical connections of the several parts.

While the device is illustrated as employed for regulating the draft toa fireplace and the admission of cold air for a heating-furnace, thedevice is capable of application to numerous other purposes, such as theregulation of ventilation and temperature of buildings by opening orclosing windows or other ventilating means; to the opening of exits inbuildings containing a large number of persons whenever the temperatureat the thermostat rises to a certain point, such as in case of a fire;to set extinguishing apparatus in play in case of a fire, or for anyother purpose where a ch nge in the temperature at the thermostatrequires certain mechanical movement to be performed.

The thermostat may be of any suitable or desired construction, andconsists of a compound bar A and two contact-points a and a. A two-pointswitch B is arranged to have a wire 0, which is connected to thecompound bar of the'thermostat secured to one of its contacts. A wire 0is secured to the other contact of the switch and to the contact-pointa, toward which the compound bar of the thermostat will bend onreduction of temperature. Awire c extendsfrom the pivot of the switch toa battery C. An electricbell D is. arranged at a suitable point whereits alarm is most liable to be observed, and said bell has a wire 0connected to one of its posts and to the battery and a wire 0 connectedto the other post and to an insulated contact upon the operatingmechanism, which contact will later be referred to.

The operating mechanism E is provided with a metallic frame E, insulatedfrom its support and having journal-bearings for four shafts,respectively lettered E, F, G and II. The shaft E carries asprocket-wheel 6, over which a chain 8 passes, and a cog-wheel e Aweight a is attached to one end of the chain and a crank e is securedupon a shaft to serve as means for winding the weight. The cogwheel 6drives the shaft Fby suitable gearing, and said shaft again drives theshafts G an d H, which latter shaft carries a fan h, which retards therevolution of the clockwork. The shaft F has cranks secured to it, bymeans of which the draft-door m and the cold-air check on for thefurnace M may be operated, said cranks having suitable flexibleconnections to said draft-door and cold-air check. The shaft hasfurthermore a disk f, having two diametrically-opposite flattenedportions in its periphery, and a radially-projecting arm f. The disk fbears with its periphery against an armature J of an electromagnet J,said disk being at such distance above the armature that it will keepthe armature depressed and in contact with the poles of the magnet whenthe unbroken periphery of the disk is in contact with the armature,while it will allow the armature to rise from contact with the poles ofthe magnet when the flattened portions of the periphery of the disk bearagainst the armature. The armature is secured to a spring, which servesto raise it when released from the attraction of the magnet, and thearmature has, furthermore, an arm j, which may engage the fan and stopthe same when the armature is raised by its spring.

. Two metallic strips or brushes K and K are arranged one at each sideof the shaft F, so that the end of the arm f upon the same may havealternate contact with said brushes when the shaft is revolved. A wire cconnects the brush K and thecontact-point a of the thermostat, and awire 0 mccawm brush K and the contact-point a of the thermostat. Ametallic spring-switch L is secured upon and insulated from the frame,and

the rigid end of said switch is connected to one terminal of the coil ofthe electromagnet by a'wire 0 The other terminal of the magnet-coil isconnected to the battery by a wire a The spring-switch bears normallyagainst a contact-stud Z upon and in electrical contact with the frame,and the switch may be raised into contact with a contact-stud Zinsulatedfrom the frame and connected to the bell by a wire c as above referredtoby a lug e projecting from the unweighted end of the motor-chain e.The end of the springs'witch is covered by an insulating-sleeve Z whichprevents short-circuiting through the chain. The weight will thus raisethe spring when it has run down and requires winding, thereby closingthe alarm-circuit and ringing the bell.

In practice the thermostat is supported at some convenient place whereit will be exposed to any change in the temperature generated by thefurnace. The bell is arranged at a place where its alarm will beconveniently noticeable, and the draft and check operating mechanism isarranged conveniently near to the furnace, with its crank-arms suitablycon.- nected to the cold-air check and the draftdoor of the furnace bymeans of cords, chains, or other flexible connections, which aresuitably guided by pulleys or other means to simultaneously open thecheck and close the draft-door, or vice versa. The electric-wireconnections between the several parts of the apparatus are suitablystrung, and the apparatus is then ready for operation as soon as theweight has been wound up. The thermostat is suitably adjusted in suchmanner that any change in the desired temperature will cause thecompound bar to close the circuit at either one or the othercontact-points, the compound bar closing against the contact-point a byincreasing temperature and closing against the contact-point a bydecreasing temperature. WVe will now assume that the temperature isrising above the desired degree, in which case the compound bar will, asabove stated, close the circuit at the contact-point a. The circuit willthus pass from the battery through the two point switch, the wire 0, thecompound bar", the contact-point a, the wire c the brush K, the arm j",the shaft F, the frame of the draft and check operating mechanism, thestud Z, the switch L, the wire o the coil of the magnet, and the wire 0back to the battery. The magnet will thus be energized and will attractits armature, so as to allow the fan to be released and the clockwork ofthe operating mechanism to be revolved. The mutilated disk f upon theshaft F will keep the armature depressed until said shaft has made aone-half revolution, and the crankarms upon said shaft will by theirrevolution cause the cold-air check to be opened and the draft-door tobe closed, thereby reducing the temperature. hen the shaft F and itsmutilated disk have made a one half revolution and the check and drafthave been changed,

the armature may again be released against the fiat portion of theperiphery of the mutilated disk, so that the stop-arm 7' will engage thefan and stop the latter. It is obvi ous that the circuit has been brokenas soon as the arm f has left the brush K, and that another circuit maybe established through said arm f and the brush K after the shaft hasmade its one-half revolution, as the arm then bears against saidlast-mentioned brush. When the temperature now becomes reduced below thepredetermined degree, the compound bar will close the circuit againstthe contact-point a, thus forming another circuit from the batterythrough the wire 0 switch B, wire a, compound bar A, contact-point a,wire 0, wire 0 brush K, arm f, shaft F, frame E, contact-point Z,spring-switch L, wire 0, the coil of the magnet and the wire 0 back tothe battery. Tlhe armature will again be attracted, the clockwork willagain be revolved, and the draft and check will again be changed so asto cause the draft to be opened and the cold-air'check to be partlyclosed. The arm f will new again be in contact with the brush K, so thatthe device will again be ready to operate by increasing temperature.When the weight has run down the lug 6 upon the chain will engage theend of the spring-switch and raise the latter out of contact with thestud Z and into contact with the stud Z, thereby closing thebell-circuit and causing the bell to ring, while at the same timecutting out the circuit for the operating mechanism. When the furnacefor some cause or other requires attention and again is to be startedup, with draft beneath the fire-place and the cold-air check partlyclosed, the switch B is turned so as to connect the battery-wire c withthe wire 0 leading to the brush K, whence the circuit will be con tinuedthrough the shaft F and the frame of the operating mechanism to themagnet, energizing the same and releasing the mechan ism, which willstart the draft and partly close the cold-air check. Thisabove-described ac tion will take place if the compound baris at restbetween the two contact-points and the arm f upon the shaft F is incontact with the brush K. If the compound bar is in contact with the hotcontact-point a, the current will cause the operating mechanism to closethe draft, whereupon the shifting of the switch will reverse saidmovement. If the compound bar is in contact with the cold contactpointa, the shifting of the switch will have no effect, as the same circuitwill be closed by shifting the switch as by having the compound barclose contact with the cold contact-point a.

WVhat I claim is- In a thermostatic regulating device, the combinationof a clockwork for operating the temperature regulating devices andprovided with a projecting lug upon its drive mechanism, a source ofelectricity, a thermostat in the circuit of said source, an electricalarm in another circuit connected to said source and normally open, anelectro-magnet in the circuit of the thermostat and connected to beenergized from the action of the latter and having an armature providedwith a stop adapted to stop and release the operating clockwork, and aspringswitch having its free end in the path of the lug upon the drivemechanism and normally closing the circuit IO of the thermostat andelectro-magnet and closing the alarm circuit when engaged and moved bythe lug upon the drive mechanism, substantially as set forth.

In testimony that I claim the foregoing to be my invention 1 havehereunto set my hand 15 this 4th day of January, A. D. 1894.

CHARLES A. HALE.

Witnesses:

WM. SEcHER, J. O. TURNER.

